BRYOZOA FROM FRANZ-JOSEF LAND. TT 
and in some allies the bars are represented by lines, as in one or 
two species of Smitéza and Cellepora; and in the mandible of 
Schizoporella auriculata, Hass., the markings seem to indicate 
the same structure. 
Besides the species referred to, P. struma, Norman, is men- 
tioned from Barents Sea and Finland; and P. patens, Smitt, 
from Spitzbergen. 
34. PoreLLa concinna, Busk. (PI. 11. figs. 9, 10.) 
From lat. 77° 55’ N., long. 53° 16’ E., there is a small specimen 
of the typical concinna with pores round the edge, and the 
peristome raised slightly at each side of the aperture. This also: 
occurs off Elmwood, and there is one specimen of the variety 
fig. 13 of Hincks, Brit. Mar. Polyzoa, also from off Elmwood. 
Loc. Greenland, Spitzbergen, Finland, Jan Mayen; lat. 
79° 55’ N., long. 51° O' H. (fidley); Gulf of St. Lawrence, 
British Columbia (H.) ; Japan (Ortmann). British seas. 
Jackson-Harmsworth Exp.: off Elmwood, 18 fathoms; lat. 
77° 55' N., long. 58° 16’ E., 130 fath.; off Cape Mary Harms- 
worth, 53-93 fath., and 50 miles off do., 234 fathoms. 
35. PoRELLA CoMPRESSA (Sow.). (PI. 11. figs. 3, 4, 5.) 
Millepora compressa, Sowerby, Brit. Miscell. 1. (1806), p. 83, pl. xli. 
Eschara cervicorns, Busk, Brit. Mus. Cat. p. 92, pl. cix. fig. 7, pl. exix. 
fig. 1. 
Se cervicornis, forma Eschare, Smitt, “ Krit. Fort.” 1867, pp. 23 
& 149, pl. xxvi. fig. 138, 139. 
Porella compressa, Hincks, Brit. Mar. Polyzoa, p. 330, pl. xlv. figs. 4— 
7, and woodcut; Lorenz, Bryozoen von Jan Mayen, p. 90; Bidenkap, 
Zool, Jahrb. vol. x. p. 627. 
There has been great confusion between this species and the 
Arctic Cellepora incrassata, Sm., and also between these and the 
Mediterranean Porella cervicornis, M.-Ed. ; and even Busk, in his 
List of Polyzoa collected by Captain H. W. Feilden in the 
North Polar Expedition, gives as Cellepora cervicornis, Busk, a 
form which is probably C. inerassata, Sm. Miss Jelly in her 
Catalogue gives Busk’s species under both C. inerassata and 
P. compressa, and it seems hopeless to attempt to reduce the 
synonyms to order. Between Porella compressa and C. surcu- 
laris it is rather a question of names, as the two, although some- 
times similar in appearance, are quite distinct in the minute 
characters. On the other hand, P. compressa and P. cervicornis 
